mb/google/zork: Reorganize chromeos.fmd to increase WP_RO to 8MiB

This change reorganizes flash map layout for zork to allow WP_RO to
grow to 8MiB. This is to allow more space for the firmware UI screens
in RO. Following changes are made in the layout:

1. MRC_CACHE_HOLE is dropped since only one slot of 64K is used for
MRC cache. Next section can start on 64K boundary immediately after
MRC cache.
2. RW_SECTION_A and RW_SECTION_B are dropped down in size to 3MiB
each. Each region is currently at ~2MiB of usage.
3. RW_ELOG is restrictred to 4KiB as that is the maximum elog size
supported by coreboot.
4. SMMSTORE is restricted to 4K.
5. RW_LEGACY region is dropped down to ~1.9MiB.

BUG=b:161949925
TEST=Verified that write-protection for RO still works fine, device
boots in recovery and non-recovery mode. Also, verified that the dump
of fmap looks correct:
dump_fmap -h firmware/image-trembyle.serial.bin
name                     start       end         size
WP_RO                      00800000    01000000    00800000
  RO_SECTION                 00804000    01000000    007fc000
    COREBOOT                   00875000    01000000    0078b000
    GBB                        00805000    00875000    00070000
    RO_FRID                    00804800    00804840    00000040
    FMAP                       00804000    00804800    00000800
  RO_VPD                     00800000    00804000    00004000
RW_LEGACY                  0061d000    00800000    001e3000
SMMSTORE                   0061c000    0061d000    00001000
RW_NVRAM                   00617000    0061c000    00005000
RW_VPD                     00615000    00617000    00002000
RW_SHARED                  00611000    00615000    00004000
  VBLOCK_DEV                 00613000    00615000    00002000
  SHARED_DATA                00611000    00613000    00002000
RW_ELOG                    00610000    00611000    00001000
RW_SECTION_B               00310000    00610000    00300000
  RW_FWID_B                  0060ff00    00610000    00000100
  FW_MAIN_B                  00312000    0060ff00    002fdf00
  VBLOCK_B                   00310000    00312000    00002000
RW_SECTION_A               00010000    00310000    00300000
  RW_FWID_A                  0030ff00    00310000    00000100
  FW_MAIN_A                  00012000    0030ff00    002fdf00
  VBLOCK_A                   00010000    00012000    00002000
RW_MRC_CACHE               00000000    00010000    00010000
SI_BIOS                    00000000    01000000    01000000

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I882f3d813c08ba5fb0ad071da4f79e723296f4b0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44362
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Joel Kitching <kitching@google.com>

1 files changed, 30 insertions, 31 deletions

diff --git a/src/mainboard/google/zork/chromeos.fmd b/src/mainboard/google/zork/chromeos.fmd
index 90cd2d7f901e..96db31eed2d6 100644
--- a/src/mainboard/google/zork/chromeos.fmd
+++ b/src/mainboard/google/zork/chromeos.fmd
@@ -1,37 +1,36 @@
-FLASH@0xFF000000 0x1000000 {
-	SI_BIOS@0x0 0x1000000 {
-		UNIFIED_MRC_CACHE@0x0 0x21000 {
-			RW_MRC_CACHE@0x0 0x10000
-			MRC_CACHE_HOLE@0x10000 0x11000
+FLASH@0xFF000000 16M {
+	SI_BIOS@0x0 16M {
+		# Size is mentioned in decimal instead of 64K because of the
+		# rules in picasso/Makefile.inc to calculate size of APOB NV.
+		# Once fmaptool is updated to provide this information, this
+		# can be changed to be like other entries.
+		RW_MRC_CACHE@0 65536
+		RW_SECTION_A 3M {
+			VBLOCK_A 8K
+			FW_MAIN_A(CBFS)
+			RW_FWID_A 256
 		}
-		RW_SECTION_A@0x21000 0x39E000 {
-			VBLOCK_A@0x0 0x10000
-			FW_MAIN_A(CBFS)@0x10000 0x38DFC0
-			RW_FWID_A@0x39DFC0 0x40
+		RW_SECTION_B 3M {
+			VBLOCK_B 8K
+			FW_MAIN_B(CBFS)
+			RW_FWID_B 256
 		}
-		RW_SECTION_B@0x3BF000 0x39E000 {
-			VBLOCK_B@0x0 0x10000
-			FW_MAIN_B(CBFS)@0x10000 0x38DFC0
-			RW_FWID_B@0x39DFC0 0x40
+		RW_ELOG(PRESERVE) 4K
+		RW_SHARED 16K {
+			SHARED_DATA 8K
+			VBLOCK_DEV 8K
 		}
-		RW_ELOG(PRESERVE)@0x75D000 0x4000
-		RW_SHARED@0x761000 0x4000 {
-			SHARED_DATA@0x0 0x2000
-			VBLOCK_DEV@0x2000 0x2000
-		}
-		RW_VPD(PRESERVE)@0x765000 0x2000
-		RW_NVRAM(PRESERVE)@0x767000 0x5000
-		RW_UNUSED@0x76C000 0x14000
-		SMMSTORE(PRESERVE)@0x780000 0x20000
-		RW_LEGACY(CBFS)@0x7A0000 0x460000
-		WP_RO@0xC00000 0x400000 {
-			RO_VPD(PRESERVE)@0x0 0x4000
-			RO_SECTION@0x4000 0x3FC000 {
-				FMAP@0x0 0x800
-				RO_FRID@0x800 0x40
-				RO_FRID_PAD@0x840 0x7C0
-				GBB@0x1000 0x70000
-				COREBOOT(CBFS)@0x71000 0x38B000
+		RW_VPD(PRESERVE) 8K
+		RW_NVRAM(PRESERVE) 20K
+		SMMSTORE(PRESERVE) 4K
+		RW_LEGACY(CBFS)
+		WP_RO@8M 8M {
+			RO_VPD(PRESERVE) 16K
+			RO_SECTION {
+				FMAP 2K
+				RO_FRID 64
+				GBB@4K 448K
+				COREBOOT(CBFS)
 			}
 		}
 	}